Which medication is commonly used to improve neuromuscular transmission in myasthenia gravis management?

• A. Neostigmine
• B. Propofol
• C. Theophylline
• D. Acetaminophen

Answer: (A)

In myasthenia gravis, the problem is that fewer acetylcholine receptors are available at the neuromuscular junction, making it harder for a nerve impulse to trigger a muscle contraction. The way to improve transmission is to increase the amount of acetylcholine available in the synaptic cleft so more receptors can be activated. A reversible acetylcholinesterase inhibitor accomplishes this by blocking the enzyme that breaks down acetylcholine, thereby prolonging its action at the junction. Neostigmine is a classic medication used for this purpose, helping to improve muscle strength and endurance by enhancing neuromuscular transmission.

Other options do not have this effect. Propofol is an anesthetic that depresses the central nervous system and respiration rather than improving NMJ transmission. Theophylline is a bronchodilator with no direct role in NMJ function. Acetaminophen relieves pain and fever but does not influence neuromuscular transmission.